#include <stdio.h>

long fatorial(long n);

int main(){
  long n = 5;

  printf("O fatorial de %ld e: %ld\n",n, fatorial(n));
}







long fatorial(long n){
  int r,x;
  if(n <= 1)
    return 1;
  else{
    x = n-1;
    r = fatorial(x);
    return (n*r);
  }
}